Which of the following are correct regarding significant figures? Choose all that apply. O when multiplying or dividing numbers, the result only has as many significant figures as the factor with the fewest significant figures O the purpose of significant figures is to indicate accuracy of a measured quantity O when adding or subtracting numbers, the result only has as many significant figures as the factor with the fewest significant figures O when adding or subtracting numbers, the result only has as many decimal places as that of the factor with the fewest decimal places O the purpose of significant figures is to indicate the precision of a measured quantity O countable quantities impact the number of significant figures in a calculation O when multiplying or dividing numbers, the result only has as many decimal places as that of the factor with the fewest decimal places O the purpose of significant figures is to annoy students (definitely select this option)